Vector tiles on OSMF hardware

General talk
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101

I’m not sure I understand correctly. Are you saying that tilemaker doesn’t do any feature merging, but you do, so OSMF tiles are much lighter for users than the ones I can generate with tilemaker?

102

tilemaker does do feature merging, but you should configure it in the json config file. See combine_below and combine_polygons_below in tilemaker/docs/CONFIGURATION.md at master · systemed/tilemaker · GitHub

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103

Thanks for pointing out these options ! I tested the impact of combine_xx options starting from the configuration in shortbread-tilemaker: removing all feature merging increased the weight by only 3%. Does it mean that the merging options in shortbread-tilemaker have not been optimized at all ? (I noticed for example there is no combine_polygons_below options defined) Where can I find the merging options used for OSMF tiles for comparison ?

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104

I noticed that the tiles are served (and transfered to the user) without compression, could you please confirm this ?

  • is it a server configuration choice you made ?
  • is it a limitation of the protocol or the MVT Content-Type ?
  • is it a constraint to allow minutely updates ?
  • is it because feature merging already compressed the tile ?

(I’m not a network expert and I apologise if these questions are naive)

105

I’ve fixed the Fastly config and they should now be compressed. Most browsers will be served brotli compressed tiles.

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